Can anybody explain following Actuarial problems step by step?

1.Mohan and John have equal amounts of money to invest. Mohan purchases a 10 year annuity-due with annual payments of Rs. 2500 each. John invests his money in a savings account earning 9% effective annual interest for two years. At the end of two years, he purchases a 15-year immediate annuity with annual payments of Z. If both annuities are valued using an effective annual rate of 8% find the value of Z.

(Answer-Rs.2514.75)

2.In fund X money accumulates at force of interest δt = .01t+.010 for 0

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